package com.wbs.shop.nuby.widget;


import android.content.Context;
import android.graphics.drawable.Drawable;

import androidx.annotation.NonNull;
import androidx.appcompat.widget.AppCompatEditText;
import androidx.core.content.ContextCompat;

import android.os.Handler;
import android.os.Message;
import android.text.Editable;
import android.text.TextWatcher;
import android.text.method.KeyListener;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;

import com.wbs.shop.nuby.R;

import butterknife.OnTextChanged;


public class InputEditText extends AppCompatEditText implements OnFocusChangeListener, TextWatcher {
    private static final int DELAY_MESSAGE_ID = 1002;
    /**
     * 删除按钮的引用
     */
    private Drawable mClearDrawable;
    /**
     * 控件是否有焦点
     */
    private boolean hasFoucs;
    private Handler mHandler;
    private OnAfterTextChanged mOnAfterTextChanged;

    public InputEditText(Context context) {
        this(context, null);
        init();
    }

    public InputEditText(Context context, AttributeSet attrs) {
        //这里构造方法也很重要，不加这个很多属性不能再XML里面定义
        this(context, attrs, android.R.attr.editTextStyle);
        init();
    }

    public InputEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }


    private void init() {
        //获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
        mClearDrawable = getCompoundDrawables()[2];
        if (mClearDrawable == null) {
//          throw new NullPointerException("You can add drawableRight attribute in XML");
            mClearDrawable = ContextCompat.getDrawable(getContext(), R.drawable.delete_selector);
        }

        mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());
        //默认设置隐藏图标
        setClearIconVisible(false);
        //设置焦点改变的监听
        setOnFocusChangeListener(this);
        //设置输入框里面内容发生改变的监听
        addTextChangedListener(this);
        setCompoundDrawablePadding(40);
    }

    public void switchDelay(boolean switchDelay, OnAfterTextChanged onAfterTextChanged) {
        mOnAfterTextChanged = onAfterTextChanged;
        if (switchDelay) {
            if (mHandler == null)
                mHandler = new Handler() {
                    @Override
                    public void handleMessage(@NonNull Message message) {
                        switch (message.what) {
                            case DELAY_MESSAGE_ID://输入1s后显示(1s内输入数据无变化)
                                if (mOnAfterTextChanged != null)
                                    mOnAfterTextChanged.change(getText());
                                break;
                        }
                    }
                };
            mHandler.removeCallbacks(() -> {
            });
        } else {
            if (mHandler != null) {
                mHandler.removeCallbacks(() -> {
                });
            }
            mHandler = null;
        }
    }

    @Override
    public void setKeyListener(KeyListener input) {
        super.setKeyListener(input);
        setOnFocusChangeListener(input != null ? this : null);
    }

    /**
     * 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件
     * 当我们按下的位置 在  EditText的宽度 - 图标到控件右边的间距 - 图标的宽度  和
     * EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            if (getCompoundDrawables()[2] != null) {
                boolean touchable = event.getX() > (getWidth() - getTotalPaddingRight())
                        && (event.getX() < ((getWidth() - getPaddingRight())));
                if (touchable) {
                    this.setText("");
                }
            }
        }

        return super.onTouchEvent(event);
    }

    /**
     * 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏
     */
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        this.hasFoucs = hasFocus;
        if (hasFocus) {
            setClearIconVisible(getText().length() > 0);
        } else {
            setClearIconVisible(false);
        }
    }

    @Override
    protected void onSelectionChanged(int selStart, int selEnd) {
        super.onSelectionChanged(selStart, selEnd);
        //保证光标始终在最后面
//        if (selStart == selEnd) {//防止不能多选
//            setSelection(getText().length());
//        }
    }

    /**
     * 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
     *
     * @param visible
     */
    protected void setClearIconVisible(boolean visible) {
        Drawable right = visible ? mClearDrawable : null;
        setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
    }


    /**
     * 当输入框里面内容发生变化的时候回调的方法
     */
    @Override
    public void onTextChanged(CharSequence s, int start, int count, int after) {
        if (hasFoucs)
            setClearIconVisible(s.length() > 0);
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void afterTextChanged(Editable s) {
        if (mHandler != null) {
            if (mHandler.hasMessages(DELAY_MESSAGE_ID)) {//信息搜索
                mHandler.removeMessages(DELAY_MESSAGE_ID);
            }
            mHandler.sendEmptyMessageDelayed(DELAY_MESSAGE_ID, 1000);
        }
    }


    /**
     * 设置晃动动画
     */
    public void setShakeAnimation() {
        this.setAnimation(shakeAnimation(5));
    }


    /**
     * 晃动动画
     *
     * @param counts 1秒钟晃动多少下
     * @return
     */
    public static Animation shakeAnimation(int counts) {
        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
        translateAnimation.setInterpolator(new CycleInterpolator(counts));
        translateAnimation.setDuration(1000);
        return translateAnimation;
    }


    public void focusable() {
        setFocusable(true);
        setFocusableInTouchMode(true);
        requestFocus();
    }

    public interface OnAfterTextChanged {
        void change(Editable s);
    }
}